/* ==========================================================================
   Layout: containers, sections, grids, site header, site footer, page header
   Breakpoints (media queries cannot read custom properties):
     40rem (640)  – tablet portrait: 2-column grids, larger gutter
     48rem (768)  – tablet landscape: larger section padding
     64rem (1024) – desktop: full navigation, 3–4 column grids, split layouts
   ========================================================================== */

.container {
  width: 100%;
  max-width: calc(var(--container) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow {
  max-width: calc(var(--container-narrow) + 2 * var(--gutter));
}

/* ---- Sections ---------------------------------------------------------------- */

.section {
  padding-block: var(--space-32);
}

.section--subtle {
  background: var(--color-surface-subtle);
}

.section--dark {
  background: var(--color-surface-inverse);
}

@media (min-width: 48rem) {
  .section { padding-block: var(--space-64); }
}

.section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-16) var(--space-32);
  margin-bottom: var(--space-32);
}

.section-header__text {
  max-width: 42rem;
}

.section-header__title {
  font-size: var(--text-heading);
}

.section-header__lead {
  margin-top: var(--space-12);
  color: var(--text-soft);
  font-size: var(--text-body-lg);
  line-height: 1.6;
}

.eyebrow {
  margin-bottom: var(--space-12);
  color: var(--accent);
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.text-accent {
  color: var(--accent);
}

/* ---- Grids -------------------------------------------------------------------- */

.grid {
  display: grid;
  gap: var(--space-24);
  grid-template-columns: minmax(0, 1fr);
}

.grid--list {
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 40rem) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 64rem) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* People: two columns even on phones so portraits stay a sensible size. */
.grid--people {
  gap: var(--space-16);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (min-width: 48rem) {
  .grid--people { gap: var(--space-24); grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 64rem) {
  .grid--people { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.split {
  display: grid;
  gap: var(--space-32);
  grid-template-columns: minmax(0, 1fr);
}

.split__text > * + * {
  margin-top: var(--space-20);
}

@media (min-width: 64rem) {
  .split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-64);
    align-items: center;
  }
}

/* ---- Site header ---------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: var(--header-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--duration-fast) var(--ease);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-card);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-16);
  min-height: var(--header-height);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-10);
  color: var(--color-text);
  text-decoration: none;
}

.brand__mark { flex: none; }
.brand__mark-bg { fill: var(--color-brand); }
.brand__mark-glyph { stroke: #fff; }

.brand__logo {
  flex: none;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  object-fit: contain;
}

.brand__name {
  font-size: var(--text-lead);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1;
  text-transform: uppercase;
}

.brand__sub {
  color: var(--color-text-soft);
  font-size: var(--text-caption);
  font-weight: 500;
  letter-spacing: 0.14em;
}

.brand--inverse { color: #fff; }
.brand--inverse .brand__mark-bg { fill: #fff; }
.brand--inverse .brand__mark-glyph { stroke: #000; }
.brand--inverse .brand__sub { color: #d1d5db; }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--color-border-control);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  transition: background-color var(--duration-instant) var(--ease);
}

.nav-toggle:hover { background: var(--color-surface-subtle); }
.nav-toggle__close { display: none; }
.nav-toggle[aria-expanded="true"] .nav-toggle__open { display: none; }
.nav-toggle[aria-expanded="true"] .nav-toggle__close { display: block; }

/* Mobile / tablet: the nav is a panel that drops below the header bar. */
.site-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  flex-direction: column;
  gap: var(--space-16);
  padding: var(--space-16) var(--gutter) var(--space-24);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
}

.site-nav.is-open { display: flex; }

.site-nav__list {
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__link {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding-inline: var(--space-12);
  border-radius: var(--radius-control);
  color: var(--color-text);
  font-size: var(--text-body);
  font-weight: 500;
  text-decoration: none;
  transition: background-color var(--duration-instant) var(--ease), color var(--duration-instant) var(--ease);
}

.site-nav__link:hover { background: var(--color-surface-tint); }
.site-nav__link[aria-current="page"] { color: var(--color-brand); font-weight: 600; }

/* --nav-breakpoint: 64rem — keep in sync with matchMedia() in components/site-header.js */
@media (min-width: 64rem) {
  .nav-toggle { display: none; }

  .site-nav {
    display: flex;
    position: static;
    flex-direction: row;
    align-items: center;
    gap: var(--space-16);
    padding: 0;
    background: none;
    border: 0;
    box-shadow: none;
  }

  .site-nav__list { flex-direction: row; gap: 0; }

  .site-nav__link {
    min-height: 44px;
    padding-inline: var(--space-10);
    border-radius: var(--radius-pill);
    font-size: var(--text-small);
  }
}

/* ---- Page header (inner pages) -------------------------------------------------- */

.page-header {
  padding-block: var(--space-32);
  background: var(--color-surface-tint);
  border-bottom: 1px solid var(--color-border);
}

@media (min-width: 48rem) {
  .page-header { padding-block: var(--space-64); }
  .page-header--detail { padding-block: var(--space-32) var(--space-64); }
}

.page-header__row {
  display: grid;
  gap: var(--space-24);
}

.page-header__title {
  font-size: clamp(var(--text-heading), 1.25rem + 4vw, var(--text-display));
  letter-spacing: -0.03em;
}

.page-header--detail .page-header__title {
  max-width: 28ch;
  font-size: clamp(var(--text-heading), 1rem + 3.5vw, var(--text-display-sm));
}

.page-header__lead {
  max-width: 46rem;
  margin-top: var(--space-16);
  color: var(--color-text-soft);
  font-size: var(--text-lead);
  line-height: 1.5;
}

.page-header--detail .page-header__lead {
  font-size: var(--text-body-lg);
}

.breadcrumbs {
  margin-bottom: var(--space-16);
  font-size: var(--text-caption);
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-8);
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  color: var(--color-text-soft);
}

.breadcrumbs a { color: var(--color-text-soft); }
.breadcrumbs a:hover { color: var(--color-brand); }
.breadcrumbs__sep { color: var(--color-text-muted); }

/* ---- Site footer ---------------------------------------------------------------- */

.site-footer {
  padding-block: var(--space-64) var(--space-32);
}

.site-footer a {
  color: var(--text-soft);
  text-decoration: none;
}

.site-footer a:hover {
  color: #fff;
  text-decoration: underline;
}

.site-footer__newsletter {
  display: grid;
  gap: var(--space-24);
  margin-bottom: var(--space-32);
  padding-bottom: var(--space-32);
  border-bottom: 1px solid var(--line);
}

@media (min-width: 48rem) {
  .site-footer__newsletter {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: center;
    gap: var(--space-64);
  }
}

.site-footer__newsletter-title { font-size: var(--text-heading-sm); }

.site-footer__newsletter-text {
  margin-top: var(--space-8);
  color: var(--text-soft);
  font-size: var(--text-small);
}

.site-footer__grid {
  display: grid;
  gap: var(--space-32);
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 40rem) {
  .site-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 64rem) {
  .site-footer__grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: var(--space-32); }
}

.site-footer__about {
  max-width: 24rem;
  margin-top: var(--space-16);
  color: var(--text-soft);
  font-size: var(--text-small);
}

.site-footer__heading {
  margin-bottom: var(--space-16);
  color: var(--text-muted);
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-footer__links {
  display: grid;
  gap: var(--space-12);
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--text-small);
}

.site-footer__address {
  display: grid;
  gap: var(--space-12);
  color: var(--text-soft);
  font-size: var(--text-small);
}

.site-footer__address p {
  display: flex;
  align-items: flex-start;
  gap: var(--space-8);
}

.site-footer__address svg { flex: none; margin-top: 4px; }

.site-footer__bottom {
  display: grid;
  gap: var(--space-8);
  margin-top: var(--space-32);
  padding-top: var(--space-24);
  border-top: 1px solid var(--line);
  color: var(--text-muted);
  font-size: var(--text-caption);
}

.social-list {
  display: flex;
  gap: var(--space-12);
  margin: var(--space-24) 0 0;
  padding: 0;
  list-style: none;
}

.social-list__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--text);
  transition: background-color var(--duration-instant) var(--ease), border-color var(--duration-instant) var(--ease);
}

.site-footer .social-list__link { color: #fff; }

.site-footer .social-list__link:hover {
  background: rgb(255 255 255 / 0.12);
  border-color: #fff;
  text-decoration: none;
}